72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
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//------------------------------------------------------------------------------
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// Copyright (c) 2001-2002, Haiku
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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// File Name: LinkMsgReader.h
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// Author: DarkWyrm <bpmagic@columbus.rr.com>
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// Pahtz <pahtz@yahoo.com.au>
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// Description: Class for receiving low-overhead port-based messages
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//
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//------------------------------------------------------------------------------
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#ifndef _LINKMSGREADER_H
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#define _LINKMSGREADER_H
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#include <OS.h>
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class LinkMsgReader
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{
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public:
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LinkMsgReader(port_id port);
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virtual ~LinkMsgReader(void);
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virtual void SetPort(port_id port);
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virtual port_id GetPort(void);
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virtual status_t GetNextMessage(int32 *code, bigtime_t timeout = B_INFINITE_TIMEOUT);
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virtual status_t Read(void *data, ssize_t size);
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virtual status_t ReadString(char **string);
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template <class Type> status_t Read(Type *data)
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{
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return Read(data, sizeof(Type));
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}
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protected:
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virtual status_t ReadFromPort(bigtime_t timeout);
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virtual status_t AdjustReplyBuffer(bigtime_t timeout);
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void ResetBuffer();
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port_id fReceivePort;
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char *fRecvBuffer;
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int32 fRecvPosition; //current read position
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int32 fRecvStart; //start of current message
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int32 fRecvBufferSize;
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int32 fDataSize; //size of data in recv buffer
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int32 fReplySize; //size of current reply message
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status_t fReadError; //Read failed for current message
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};
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#endif
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